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Related Clues:
- Swept under the rug
- Kept a low profile
- Awaited the surprise party honoree
- Observed secretly
- Did secret-agent work
- Emulated a 29-Down
- Blocked from view
- Was on a stakeout
- Acted as a mole
- Dug around, like a mole
- Worked for CSIS
- Kept out of sight
- Worked undercover
- Watched furtively, with "on"
- Became a hermit